Series W30 Gauge Valvesand W20 Visual LevelIndicator Assembly Shown

W20 Sight Glass Visual Level Indicator

ApplicationThe Series W20 is a one-piece chamber general purpose, rugged flat glass gauge for mid-range pressure temperature applications.Standard construction includes a solid one-piece chamber machinedfrom carbon steel with carbon steel covers, toughened glass, and plat-ed carbon steel bolts and nuts. All metal parts are rustproofed, and arecessed gasket seat prevents movement, insuring leak-free service.

Features • Available in 9 standard glass sizes

• Constructed with multiple vision slots for longer size requirements

• Toughened molded glass is resistant to thermal and mechanicalshock and made in accordance with BS 3463, DIN 7081

• Quality Assurance Testing: All gauges are hydrostatically testedto 1.5 times the rated pressure at 100˚F (38˚C)

• Materials conform to NACE MR0175 specifications

• Replaces industry standard level gauges

• Female NPT and Union connections available

• Series W20 Sight Glass and W30 Gauge Valve assemblies available

• Repair kit available upon request

Specifications Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 through 9

Connections . . . . . . . . . . . . . . . . 1/2" NPT Top-bottom, Standard

Series W20Section No. 14.1

©2014 The WellMark Company • Litho USA • WMW20-1/14 • All registered trademarks are the property of their respective owners. 1

The Company • Oklahoma City, Oklahoma • Tel: (405) 672-6660 • Fax: (405) 672-6661 • wellmarkco.com

Series W20R Shown

Center-to-Center Dimensionfor Assembly Size

(See How To Order)

Series W20R Level Indicator and W30 Gauge Valve Plain Assembly

W20 Sight Glass Visual Level Indicator

Series W20Section No. 14.1

Center to Center DimensionsLeave Blank if No Valves(See Standard Visible Length Chart below)

A • No Gauge Valves (1/2" Glass)B • 1/2" Tank Union and 1/2" NPT GlassC • 1/2" Tank Union and 1/2" Union GlassD • 3/4" Tank Union and 1/2" NPT GlassE • 3/4" Tank Union and 1/2" Union Glass

Size No. /Length Code(See Standard Visible Length Chart below)

R • ReflexT • Transparent

MODEL W20 - 11 R B 1021

Determining the Model NumberExample given: Model W20 -11RB1021, Series W20 Sight Glass with a Visible Length of 3.75", Reflex Style Glass, one set of W30 GaugeValves, with 10.21" Valve Center-to-Center Dimension once assembled, 1/2" Tank Union to Valve and 1/2" Valve to Glass Connections.

Length

Type

Connections

AssemblySize*

Dimensional Data

The Company • Oklahoma City, Oklahoma • Tel: (405) 672-6660 • Fax: (405) 672-6661 • wellmarkco.com2 ©2014 The WellMark Company • Litho USA • WMW20-1/14 • All registered trademarks are the property of their respective owners.

Pressure TemperatureReflex Gauges

Temp.Length Code

( ˚F )1 2 3 4 5 6 7 8 9

Pressure (psi)100 2988 2901 2727 2611 2495 2350 2219 2103 2002200 2828 2727 2596 2466 2350 2219 2089 2002 1900300 2654 2538 2437 2321 2205 2089 1973 1871 1755400 2466 2350 2248 2132 2031 1929 1813 1711 1610500 2263 2161 2060 1958 1856 1755 1653 1552 1450600 2031 1944 1857 1755 1668 1552 1479 1378 1305750 1653 1595 1494 1407 1305 1247 1160 1044 1001

Standard Visible Length

Transparent Gauges

Temp.Length Code

( ˚F )1 2 3 4 5 6 7 8 9

Pressure (psi)100 2002 1856 1755 1595 1508 1349 1247 1102 1001200 1755 1784 1668 1552 1436 1305 1175 1059 957300 1769 1668 1552 1450 1334 1218 1102 1001 899400 1682 1581 1465 1349 1247 1146 1044 928 856500 1537 1450 1349 1247 1160 1044 957 856 754600 1349 1276 1175 1102 1015 928 856 754 682750 1102 1059 1001 899 856 754 696 609 551

Series W20R* (Reflex)

Series W20T*(Transparent)

3.375"

3.375"

4"5"

1/2" NPT

B A

1/2" NPTSize No/ (A) Visible (B) Overall Weight (lbs.) Assembly Center-to-Center*Length Code Length (in.) Length (in.) Reflex Trans. Plain (in.) Union (in.)

11 3.75 5.25 8 12 8.75 12.0012 4.75 6.25 9 14 9.75 13.0013 5.75 7.25 11 17 10.75 14.0014 6.75 8.25 12 17 11.75 15.0015 7.88 9.38 14 21 12.88 16.1316 9.13 10.63 16 24 14.13 17.3817 10.13 11.75 18 27 15.13 18.5018 11.88 13.38 20 30 16.88 20.1319 12.63 14.13 21 32 17.63 20.8823 13.00 14.50 22 33 18.00 21.2524 15.00 16.50 25 38 20.00 23.2525 17.25 18.75 28 43 22.25 25.5026 19.75 21.25 32 49 24.75 28.0027 22.00 23.50 35 54 27.00 30.2528 25.25 26.75 40 61 30.25 33.5029 26.75 28.25 43 64 31.75 35.0036 30.38 31.88 48 73 35.38 38.6337 33.75 35.25 53 80 38.75 42.0038 38.63 40.13 60 92 43.63 46.8839 40.88 42.38 64 97 45.88 49.1347 45.50 47.00 70 107 50.50 53.7548 52.00 53.50 80 122 57.00 60.2549 55.00 56.50 85 129 60.00 63.2557 57.25 58.75 87 134 62.25 65.5058 65.38 66.88 100 152 70.38 73.6359 69.13 70.63 106 161 74.13 77.3868 78.75 80.25 121 182 83.75 87.0069 83.24 84.75 127 193 88.24 91.5078 92.13 93.63 144 212 97.13 100.3879 97.38 98.88 148 226 102.38 105.6388 105.50 107.00 165 242 110.50 113.7589 111.50 113.00 173 258 116.50 119.7598 118.88 120.38 185 272 123.88 127.1399 125.63 127.13 193 276 130.63 133.88

All information stated above is approximate and is given for guidance only.*Assemblies shipped as individual components unless otherwise requested.